Label the parts from A-D.
A - Epicarp, B - Mesocarp, C - Seed, D - Endocarp
Fruit is a characteristic feature of the flowering plants. It is a mature or ripened ovary, developed after fertilisation. Generally, a fruit consists of a wall or pericarp and seeds. The pericarp may be dry or fleshy. When pericarp is thick and fleshy, it is differentiated into the outer epicarp, the middle mesocarp and the inner endocarp. The epicarp forms the tough outer skin of the fruit, if there is one. The epicarp is sometimes called the exocarp. The mesocarp (from Greek: meso-, "middle" + -carp, "fruit") is the fleshy middle layer of the pericarp of a fruit; it is found between the epicarp and the endocarp. It is usually the part of the fruit that is eaten. Endocarp (from Greek: endo-, "inside" + -carp, "fruit") is a botanical term for the inside layer of the pericarp (or fruit), which directly surrounds the seeds. It may be membranous as in citrus where it is the only part consumed, or thick and hard as in the stone fruits such as peaches, cherries, plums, and apricots.